Those countries didn't have their own government propping up the drug trade in order to generate illicit funding for illegal wars and to criminalize and imprison poor black people. USA did.

> these countries that sentence drug traffickers to death.

USA put small-time addicted drug users, in long jail terms. But only if they use crack, the "poor/black people" variant of cocaine, not the (expensive) white-powder variant of cocaine that rich/white people used.